hk91是hk公司为打入美国民间市场而开发的g3美国民用版，为符合相关法例，hk91只能半自动射击。 由于当时HK91的售价只有400美元，成为当时HK公司在美国民间市场中最受欢迎的产品，从1974年到1989年，总共有48,817支HK91出口到美国。

2024年8月7日 · The G3/HK-91 has a reputation for durability. Does the US-made PTR-91 clone live up to that legacy? Check out our PTR-91 review to find out!

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Chambered in 7.62x51mm NATO (.308 Winchester), the HK 91 was built to provide civilian shooters with a high-quality semi-automatic rifle that retained the performance and durability of its military counterpart. The HK 91 operates on a roller-delayed blowback system, a hallmark of Heckler & Koch’s design.

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Subsequently, Heckler & Koch ceased manufacture of the semi-automatic G3-variant, the HK91. The PTR-91 was developed to fill perceived void in supply as an American variant of the original G3 battle rifle.

The Selfloading Rifle HK 91 is the non-military design of the well-known Automatic Rifle G3, adopted as standard weapon by the Deutsche Bundeswehr (Federal German Armed Forces) and the armed forces of severa I other nations. The HK 91 is like the G3 a recoil operated weapon incorporating a de­

P91钢是在原9Cr-1Mo钢基础上加进V，Nb，N等强化元素，形成一种变质新钢种。新建的亚临界机组中，主蒸汽管道及再热蒸汽管道热段的材料已用P91钢代替P22钢。

Chambered in 7.62 X 51 NATO, the G3 is one robust, reliable rifle that has seen service around the globe. The G3 and its semi-automatic version, the HK 91, are made primarily with plastic furniture, stamped receivers, a hammer forged barrel, and use the Roller-Delayed Blowback operating system.

HK 91 is a semiautomatic rifle version of the Heckler & Koch G3 automatic rifle that was produced by Heckler & Koch for the civilian market in the 1960s. The HK91 is rather valuable in the United States firearm market since it was banned from further importation by executive order in 1989.Only 48,817 HK91s were imported into the U.S. prior to 1989.